The common challenges when transitioning from Citrix Administration to the Cloud domain include learning new technology stack, understanding cloud platforms and services, adapting to cloud architecture concepts, mastering automation and scripting, migrating applications and data, ensuring security and compliance, and managing scalability.
If you are interested in pursuing a career in cloud domain but dont have required skills then I would recommend you to take up azure online course from Intellipaat. This training helps you to learn every concepts from basic level through hands on labs for better understanding. Along with that do check out this video on how Kiran Kumar achieved a career transition from a citrix admin to a cloud team lead with the help of Intellipaat training -